1398490 has 16 divisors (see below), whose sum is σ = 2542752. Its totient is φ = 553744.

The previous prime is 1398473. The next prime is 1398493. The reversal of 1398490 is 948931.

It is not an unprimeable number, because it can be changed into a prime (1398493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417 + ... + 1723.

It is an arithmetic number, because the mean of its divisors is an integer number (158922).

2^1398490 is an apocalyptic number.

1398490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1398490 is a deficient number, since it is larger than the sum of its proper divisors (1144262).

1398490 is a wasteful number, since it uses less digits than its factorization.

1398490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1398490 is about 1182.5776930079. The cubic root of 1398490 is about 111.8286602086.

The spelling of 1398490 in words is "one million, three hundred ninety-eight thousand, four hundred ninety".